Smoke-consuming apparatus for furnaces.



PATENTED MAR. a, 1903.

- l J. ALVES. SMOKE GONSUMING APPARATUS POR FURNACES.. 1

APPLIOATION FILED IAB.. 2B, 1901.

` 2 SHEETS-SHEET 1.

N0 MODEL.

IIIIIIIIIIIIIIIIIIIIIIIIIII No. 721,652. PATENTED MAR. 3, 1903.

` v J. ALVES.

SMOKE GONSUMING APPARATUS FOR FURNAGBS.

lAPPLICATION FILED IAB.. 26, 1901.

2 SHEETS-SHEET 2.

l UNITED STATES PATENT A(DEEICE.

Jol-1N ALvEs, or LoNDoN, ENGLAND.

SMOKE-CONSUMING APPARATUS.Y Foa FURNACES.

srEcrrrcAcrroN forming part @fr Letters rate@ 721,652, dated March s, 190s.

Applicationkled March 26, 1901.

To a/ZZ whom it may concern: y

Be it known that l, JOHN ALVES, a subject of the King of Great Britainand Ireland, residing at and 51 Lime street, in the city of London, England, have invented certain new and useful Improvements in Smoke-Consuming Apparatus for Furnaces, (in respect whereof I have applied for a patent in Great Britain to bear date February 12, 1901, No. 3,050,) of which the following is a specifica-f tion.

This invention relates to improved means applicable to steam boiler and other furnaces, whereby under the influence of steam` jets air is supplied for admixture with the furnace-gases,with the objects of eecting thev complete combustion of the fuel, of preventing the escape of smoke, and of increasing the efciency of the furnace. l

The invention also relates to means for controlling the supply of air and steam and insuring their being fed in proper relative proportions.

In the accompanying drawings the appa-` ratus adapted for accomplishing the objects of my invention is illustrated.

Figures 1 to 5, inclusive, illustrate means for supplying air for admixture with the fur-Y nace-gases according to my improved method of working, Fig. 1 being a transverse section taken along the line c :rin Fig. 3 and extending through one of the heated air and steam passages; Fig. 2, a transverse section. taken along the line 'y y in Fig. 3 and extending through one of the passages for the incoming air; Fig. 3, a viewV of the bridge, partly in' front elevation and partly in section, on the line z z in Fig. 1; Figa, asection taken along the line z' c' in Fig. 1; and Figp, a view of' the bridge, partly in plan and partly in horizontal section, along the line z2 z2 in Fig. 1. Fig. 6 shows the front of a furnace provided with means for simultaneously regulating Vand feeding the steam and air in proper rela tive proportions. Fig. 7 is a view partly in side elevation and partlyrin longitudinal section, and Fig. 8 a plan view corresponding with Fig. 6. f

Where steam-jets are employed to inject 5o air into furnaces and where the steam is,

prior to its use for such purpose, caused to pass through pipes or passages arranged in vserai No. 52,973. (No man.)

or about the bridge A with a view to becoming superheated, the superheaterB is preferably arranged in such a manner as to be capableof removal for repair or renewal without disturbing the bridge. To this end the superheater B is formed distinct from the bridge A and secured thereto by means of bolts b. The perforated pipe D, whence the' steam-jets issue, is combined with the pipe, pipes, or passages constituting the superheaterB, as shown in Figs. 3 and 4.

The air admitted through or over the bridge A is caused to pass through a series of passages formed in the air-space E behind the bridge A. jln the construction illustrated the bridge is formed with alternate passages, one set, 0,0, serving for the conductof air prior to its meeting the steam-jets, and the fother set, a, serving for the conveyance of the heated air to the furnace after the same has come under thedirect action of` the steamjets. The walls of the air-passages a0 derive -heat from the furnace'and convey it to the air while the latter traverses' thev comparatively narrow air-passages,with the effect that the incoming air is not only heated, but the bridge as a whole is cooled. A fire-bridge of this description may, if desired, be constructedr on the sectional system, as shownthat is to say,lit may be divided into a number of similar elements strung togetherlon through -bolts AX. The terminal sections A0 A0 are, however, special in design.

The course taken by the air is indicated in Figs. y1 and 2 by arrows. It will be seen that upon the air entering the chamber E by way of the pipe or pipes c it passes upwardly through the Vpassages a0, Fig. 2, deriving heat from the surfaces of the bridge. Leaving the passages cto it enters the upper portion of the chamber E' and issues thence through the passages a under the influence of the steam-jets, Fig. 1. The upper and lower portions of the chamber E' are placed in communication by means of openings ctXaX.

In order to provide for the simultaneous regulation in proper relative'proportions of the steam and air admitted to thefurnacebridge, the steam-cock c, pertaining to the steam-supply pipe C, and the air-regulators E E, pertaining to the air-supply pipes e e, are connected with a hand-lever F which, for

IOU

convenience, is arranged against the face of the boiler, as shown. The cock c is operated by the slotted radialarm c',which is connected with the lever F by means of the link f. The air-regulators E E are mounted at the front end of the tubes e e, which traverse the ash-pit G, the back ends of the said air-tubes being connected with the air-chamber E' at the back of the bridge A. The regulators E E pertaining to the two air-supply tubes e e, are yoked together by means of the bar e', their simultaneous operation being effected by the link f, which connects the yoke e with the lever F. The air-supply tube e may, however, be dispensed with and the hand-lever F connected by means of a rod to adamper mounted Within or in the face of the air-chamber E' at the back of the bridge. Such an arrangement will be so readily conceived as to render its illustration unnecessary. An opening closed by a suitably-formed door or plate E2 is provided for use in augmenting the supply of air to the chamber E and also in enabling any clinker orrefuse to be removed from the said chamber.

According to the method of construction herein described the supply of steam and air, and consequently of heated air, to the furnace is under complete control. The air which enters the chamber E' becomes heated by contact with the surfaces of the bridge and of the chamber and issues, under the in iluence of the steam-jets, through the openings a, formed in the bridge A.' The jet-pipe D is connected with the superheater B by a branch d. (Shown in dotted lines in Fig. 7.)

A lining of fire-clay or other refractory material may be applied to the face of the bridge exposed to the fire.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. In smoke consuming apparatus for steam-boiler and other furnaces wherein heated air, under the influence of steam-jets, is supplied to the furnace, a bridge A, walls therein dividing the bridge and constituting passages a0 for the incoming air and alternating passages a for the heated air, a steamsuperheater B secured to the upper side of the said bridge, a steam-jet pipe D traversing the passages a0, a, and in communication with the superheater B, and a chamber E', at the rear of the bridge, into which the passages a0 open, the latter serving to conduct and heat the air prior to its being impelled through the alternating passages et under the influence of the steam-jets into the furnace, substantially as set forth.

2. In smoke consuming apparatus for steam-boiler and other furnaces wherein heated air, under the. influence of steam-jets, is supplied to the furnace, the combination of a fire-bridge A, a superheater B `mounted thereon, a steam-jet pipe D passing transversely therethrough and in communication with the superheater, air-pipes e in communication with the bridge, a steam-supply pipe C, connected with the superheater, a lever F, a radial arm c on the steam-cock c, a link f connecting the said arm with the lever, a conmeeting-bar e for the regulators E and a link f for connecting the said bar with the lever F, substantially as and for the purposes specifled.

lIn testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN ALVES.

Witnesses:

WM. O. BROWN, H. SMITH. 

